Optical fiber producing method

Details Optical fiber producing method Optical fiber producing method

2005-08-16

2005-08-16

Hug, Eric (Department: 1731)

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

Process of manufacturing optical fibers, waveguides, or...

C065S435000, C065S384000, C065S488000, C065S507000

Reexamination Certificate

active

06928840

ABSTRACT:
A drawing apparatus1comprises a drawing furnace11, a protecting tube21, and a resin curing unit31. A buffer chamber41is disposed between the drawing furnace11and the protecting tube21, and has a length L1in the drawing direction of the optical fiber3. The buffer chamber41is constituted by a first buffer cell42and a second buffer cell45. In the space within the buffer chamber41, an He gas, which is an atmosphere gas within the drawing furnace11, and the air, which is an atmosphere gas within the protecting tube21, exist in a mixed state. The optical fiber3drawn upon heating in the drawing furnace11is fed to the protecting tube21, and a predetermined part of the optical fiber3is annealed at a predetermined cooling rate. Thereafter, a coating die62coats the optical fiber3with a UV resin solution63, and the resin curing unit31cures the UV resin63, whereby a coated optical fiber4is obtained.

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